Results 61 to 70 of about 26,842 (252)

Seeds of change: The impact of Ethiopia's direct seed marketing approach on smallholders' seed purchases and productivity

American Journal of Agricultural Economics, EarlyView.
Abstract While multiple factors explain low adoption rates of improved varieties by small‐scale farmers in sub‐Saharan Africa, a key supply‐side constraint is the limited availability of seed embodying new traits in the volume, quality, price, and timeliness required by farmers. This constraint is partly attributable to classical failures in the market
Dawit Mekonnen, Gashaw T. Abate, Seid Yimam, Rui Benfica, David J. Spielman, Frank Place   +5 more
wiley   +1 more source

Two years and counting: The dynamics of long‐term youth mentoring and association with parent and peer relationships

American Journal of Community Psychology, EarlyView.
Abstract The current study seeks to explore the reciprocal associations between mentor–mentee relationship strength and relationships with parents and peers across 2 years of mentoring. It is a secondary analysis of data collected by a national mentoring organization from youth (N = 1368; M age = 11.5 years; 59% female; White [n = 629], 30% Black [n ...
Westley L. Fallavollita, Michael D. Lyons   +1 more
wiley   +1 more source

Scared fitless: Context-dependent response of fear to loss of predators over evolutionary time in Drosophila melanogaster

FACETS, 2017
Fear of predation can disappear rapidly in the absence of predators, as bolder individuals outcompete vigilant individuals for food and mates. To examine the evolution of fear in a seasonal environment, we exposed Drosophila melanogaster to mantid ...
Kyle H. Elliott, D. Ryan Norris, Gustavo S. Betini, Ian Dworkin   +3 more
doaj   +1 more source

Crosswinds During Spring Migration Carryover and Influence the Time Interval Between Arrival and Laying in a Neotropical Migrant

Ecology and Evolution
Events on the non‐breeding grounds and on migration can influence the timing of reproduction and the productivity of migratory songbirds. We show, using data from a 12‐year study in Revelstoke, BC, Canada, that the onset of breeding in yellow warblers ...
Michal Pavlik, Tony D. Williams, David J. Green   +2 more
doaj   +1 more source

Increased Temperature and Exposure to Ammonium Alter the Life Cycle of an Anuran Species

Ecology and Evolution
Amphibian populations are undergoing a major recession worldwide, likely triggered by global change components such as the global warming and pollutants, among which agrochemicals, in general, and fertilizers, in particular, play a central role given ...
Francisco Javier Zamora‐Camacho, Pedro Aragón   +1 more
doaj   +1 more source

Migration Distance and Body Condition Influence Shorebird Migration Strategies and Stopover Decisions During Southbound Migration

Frontiers in Ecology and Evolution, 2019
Technological constraints have limited our ability to compare and determine the proximate and ultimate drivers of migratory behavior in small-bodied birds.
Alexandra M. Anderson, Sjoerd Duijns, Paul A. Smith, Christian Friis, Erica Nol   +4 more
doaj   +1 more source

Circular weakly balanced cross-over designs in periods of two and three different sizes

Kuwait Journal of Science
Cross-over designs (CODs) have applications in many branches of scientific inquiry. The use of CODs can lead to carryover effects, which are the main source of bias in the estimation of treatment effects.
doaj   +1 more source

Hybrid Inertial–Centrifugal Gas–Liquid Separator: CFD‐Driven Optimization Using Coupled Discrete Phase and Wall‐Film Modeling With Response Surface Methodology

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Efficient removal of liquid aerosols from compressed gas streams is essential in chemical and energy processes. Conventional separators relying on a single mechanism (inertial or centrifugal) struggle to capture both fine and coarse droplets simultaneously.
Son Ung Kang, Phyong Jon Thak, Kyong Jun Ri, Chung Hyok Choe   +3 more
wiley   +1 more source

Carryover effects of aromatase inhibitors in prevention [PDF]

The Lancet, 2020
Saranya, Chumsri, E Aubrey, Thompson
openaire   +2 more sources

Behavioral Incentives for Exercise and Intra‐Articular Glucocorticoids for Knee Osteoarthritis: Results From a Factorially Designed Pragmatic Randomized Clinical Trial

Arthritis &Rheumatology, EarlyView.
Objective The purpose of this study was to determine the benefit of a behaviorally designed incentive program and glucocorticoid injections in reducing symptoms and promoting physical activity in patients with knee osteoarthritis (KOA). Methods This was a pragmatic, multisite, factorially designed, blinded, randomized clinical trial.
Joshua F. Baker, Katherine D. Wysham, Mercedes Quinones, Bryant R. England, Kaitian Jin, Marianna Olave, Sarah Wetzel, Rachel L. Gillcrist, Criswell Lavery, Natalie Keller, Bridget Kramer, Bibianna Ateh, Hannah Brubeck, Daniel K. White, Alexis Ogdie, Rui Xiao, Tuhina Neogi, Carla R. Scanzello   +17 more
wiley   +1 more source